China said on Friday the Philippines had sent supplies to a beached warship on Second Thomas Shoal, a disputed atoll in the South China Sea. In a separate statement, the Phlippine Coast Guard said it had rotated personnel staffing the Sierra Madre and sent supplies to the vessel.

The Philippines has protested China’s baselines around the disputed Scarborough Shoal, as tensions between the two nations build up anew over their competing claims in the South China Sea.

Philippine President Marcos passed two maritime laws last week in a move that Manila says will strengthen its sovereignty over waters within the country’s archipelago and the South China Sea. Using standards set forth by the United Nations Convention on the Law of the Sea (UNCLOS),